208 results about "Space group" patented technology

The invention discloses a series of alkali metal borate compounds and alkali metal borate crystals as well as a preparation method and application thereof, and belongs to the technical field of photoelectric functional crystal materials. The chemical general formula of the series of compounds and crystals thereof is A3RE (B3O6) 2, wherein A is K, Rb, Cs or NH4; rE = Sc and Y, the molecular weight is 355.93-744.48, the series of crystals belong to a trigonal system, the space group is P321, the cell parameters a = b = 10.5237 (13)-135237 (13), and # imgabs0 # Z = 3. The series of alkali metal borate compounds are synthesized by adopting a solid-phase reaction method or a hydrothermal method, and the series of crystals grow by adopting a high-temperature melt method or a hydrothermal method or a solution method. The series of materials can be used for manufacturing second harmonic generators, upper and lower frequency converters, optical parametric oscillators, polarizing prisms and the like.

The invention discloses a crystal material generation method and system based on an energy band condition and a space group symmetry constraint. The method comprises the following steps: obtaining crystal structure data; calculating energy band data corresponding to the crystal structure, performing standardization processing on the energy band data, and generating a training data set together with the crystal structure data; performing feature compression on the energy band data, and generating an energy band condition implicit vector by using an encoder; constructing a conditional autoregression generation model, and training an autoregression model by using the training data set to obtain a trained model; jointly inputting an embedded vector of a space group number and an energy band condition implicit vector into the trained model, generating an atom type, an atom fraction coordinate and a lattice parameter according to a Wyckoff alphabetic sequence, and generating a crystal material structure; and through position selection of Wyckoff letters in a symmetric mask constraint generation process, a lattice parameter consistency loss function optimization model is utilized, so that a predicted energy band of a crystal material structure is matched with a target energy band.

The invention discloses a high-entropy O3 phase layered oxide material, a preparation method, application and a battery. The chemical formula of the material is Na < 1-x-y > Ca < y > Li Ni Cu < c > Fe < d > Co < e > Mn < f > Ti < g > O < 2 >, the material belongs to a hexagonal system, and the space group is R-3m; wherein 0 lt; x is less than or equal to 0.1, 0lt; a + b + c + d + e + f + g = 1, 0 < a < = 0.1, 0.15 < = b < = 0.3, 0 < c < = 0.1, 0.08 < = d < = 0.25, 0 < e < = 0.08, 0.3 < = f < = 0.5, and 0 < g < = 0.1. The high-entropy O3-phase layered oxide material prepared by the invention has relatively good structural stability and air stability, and the preparation method is simple and easy for large-scale production; the sodium ion battery formed by using the lithium ion battery positive electrode material as a positive electrode active material has the characteristics of high cycling stability, high rate capability and fast charge.

The invention relates to a crystal space group identification and uncertainty quantification method and system, and belongs to the technical field of material crystallography analysis. According to the method, an end-to-end deep learning system is constructed, implicit depth features and explicit physical features based on domain knowledge in an original diffraction pattern are extracted by using two channels, and then dynamic weighted fusion is performed on the features extracted by the two channels by using an adaptive gating fusion mechanism, so that a deep learning algorithm is obtained. And finally, carrying out classification prediction on the fused features and carrying out quantitative evaluation on uncertainty of a prediction result, thereby realizing comprehensive coverage from automatic classification to credibility analysis. Compared with a traditional automatic space group classification model for prediction, the method has the advantages that the classification accuracy, the analysis robustness and the interpretability of an evaluation result on noise-containing real data are remarkably improved, and an intelligent and reliable innovative solution is provided for automatic representation of modern high-throughput materials.

The invention belongs to the technical field of chiral material preparation, and particularly relates to a one-dimensional bismuth-based chiral perovskite crystal and a preparation method and application thereof. The general formula of the chiral perovskite crystal is (R-beta-MPA) 2BiI5 or (S-beta-MPA) 2BiI5, the chemical formula of the chiral perovskite crystal is C18H28BiI5N2, the R-beta-MPA represents (R)-(+)-beta-methyl phenylethylamine, the S-beta-MPA represents (S)-(-)-beta-methyl phenylethylamine, the R-beta-MPA represents (R)-(+)-beta-methyl phenylethylamine, and the S-beta-MPA represents (S)-(-)-beta-methyl phenylethylamine. The crystallographic data of the (R-beta-MPA) 2BiI5 include that the crystal belongs to an orthorhombic crystal system and a P212121 space group, and the cell parameters are as follows: alpha is equal to 90 degrees, beta is equal to 90 degrees, and gamma is equal to 90 degrees; the crystallographic data of the (S-beta-MPA) 2BiI5 comprises that the crystal belongs to an orthorhombic crystal system and a P212121 space group, and the cell parameters are as follows: alpha is equal to 90 degrees, beta is equal to 90 degrees, and gamma is equal to 90 degrees.

This antiferromagnetic material has a hexagonal crystal structure (space group P63 / mmc) and has a composition of (Mn1-xAx)3Sn (0<x<0.15, A=Ti, V, Cr, Zr, Nb, Mo, Tc, Hf, Ta, W, Re) or Mn3Sn1-yBy (0<y<0.35, B=Sc, Ti, V, Ga, Y, Zr, Nb, In, Hf, Tl). A is preferably at least one of V and Cr. Also, B is preferably at least one of Ga, In, and Tl.

This invention relates to the field of chemical pharmaceuticals, and more particularly to a mebendazole crystal form and its preparation method. The mebendazole crystal form has a single-crystal structure belonging to the triclinic crystal system; space group Triclinic P; cell parameters a = 6.10 Å, b = 15.69 Å, c = 20.35 Å; α = 94.14°; β = 97.22°, γ = 90.70°, V = 1926 Å. 3 The optimization and development of the crystalline form of p-toluimidazole provided by this invention is of great value.

The invention relates to a sulfur-antimony-lanthanum-barium compound, a sulfur-antimony-lanthanum-barium mid-far infrared birefringent optical crystal and a preparation method and application thereof, relates to a mid-far infrared birefringent crystal and a preparation method and application thereof, and aims to solve the problem of low birefringence of the existing mid-far infrared crystal, the sulfur-antimony-lanthanum-barium compound has the chemical formula of Ba2La2Sb4S10 (S2) and the molecular weight of 1424.22, is crystallized in a monoclinic system, and has the molecular weight of 294nm. The space group is P21 / c, and the cell parameters are as follows: a = 8.6373 (5), b = 14.7336 (9), c = 15.9161 (9), alpha = gamma = 90 degrees, and beta = 92.661 (2) degrees. Preparing a compound or a polycrystal material by using a high-temperature solution or a solid-phase method; a polycrystalline material is used for growing a single crystal, the birefringence of the single crystal is 0.53 at the position of 1064 nm, the single crystal has large birefringence within the range of 1-14 microns, and the single crystal is used in an optical isolator, a circulator, a beam shifter, an optical polarizer or an optical modulator.

The invention discloses a method for predicting a new crystal structure based on an adversarial generative model, which combines a group theory, Wyckoff site analysis, a machine learning coding technology and an energy prediction agent model, and aims at reducing the experiment trial and error cost and realizing efficient structure prediction and screening. According to the method, by calculating, simulating and predicting the crystal structure, dependence on experimental conditions and trial and error times are reduced, and efficient prediction and rapid screening of the crystal structure are achieved by combining the adversarial generative model and the proxy model. A user can specify or not specify conditions such as components, space groups and the total number of atoms in unit cells according to needs, and the crystal structure is generated in a customized mode.

The invention belongs to the technical field of nonlinear optical crystals, and particularly relates to a zeolite-like structure nitrogen oxide silicate nonlinear optical crystal and a preparation method and application thereof, the chemical general formula of the crystal is Ba3Si3N5OCl, the crystal belongs to a hexagonal system, the cell parameters of the crystal are as follows: a is 9.5147 (6), c is 5.5002 (4), V is 431.22 (6) 3, Z is 2, the space group is P-62c, and the crystal has a non-centrosymmetric structure. The Ba3Si3N5OCl crystal provided by the invention is used as a novel zeolite-like structure nitrogen oxide silicate, successfully integrates nonlinear optical activity and phase matching capability, can generate frequency doubling response which is about 0.2 times of KDP (potassium dihydrogen phosphate) under 1064 nm laser pumping, and can realize phase matching, so that the Ba3Si3N5OCl crystal becomes a nonlinear optical material with practical device application potential.

The present invention discloses a method for observing the step-by-step peeling of the two-dimensional morphology of crystal materials. By analyzing the space group information and structural symmetry of the target crystal, the method realizes the automatic division of different crystal face stacking modes, quickly finds the characteristic crystal face where the bulk material may be peeled out of the two-dimensional morphology, and accurately locates the critical site where the crystal face separation occurs. At the same time, the method provides the details of the interface coupling reconstruction at the critical point of the crystal face separation, and depicts the dynamic evolution image of the atomic bonding / breaking and configuration wave function during the entire peeling process. The present invention obtains the target peeling crystal face of the material by analyzing the symmetry of the crystal structure, the close packing of the crystal face atoms, and the wave function bonding effect, and provides high-precision crystal peeling data, which solves the key problem of the lack of intelligent peeling methods for crystal materials and greatly accelerates the research and development efficiency of two-dimensional materials.

This invention discloses a samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal material, its preparation method, and its applications. The samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal material belongs to the monoclinic crystal system, has a space group of Cm, and a chemical formula of Sm. 0.3 La 0.1 :Y 0.6 Ca4O(BO3)3 has a second harmonic response intensity of 0.89 × KDP, and exhibits transmittance exceeding 80% in the 500–1000 nm and 1600–2400 nm wavelength ranges. It also has a strong absorption peak in the 1000–1600 nm wavelength range. Therefore, the samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal can be considered as a nonlinear optical crystal material with broad application prospects in the field of optics.

The application discloses a three-dimensional ferroelectric material based on two-dimensional ice stacking and preparation and application thereof, and belongs to the technical field of ferroelectric materials and multifunctional devices. The material is a three-dimensional periodic crystal structure of monoclinic P21 space group, water molecules in the material form a completely saturated network through hydrogen bonds, and there is no suspended hydrogen; interlayers are coupled through van der Waals force to form a multi-level cooperative ferroelectric sequence of "in-plane hydrogen bond ferroelectric + interlayer van der Waals ferroelectric". The material has the characteristics of a wide-bandgap semiconductor (band gap 5-6 eV), extreme anisotropic mechanical properties (Z-axis Young's modulus 48.6 GPa, Eyx=0.973), moderate bulk modulus (12.23 GPa), good acoustic performance (sound velocity 2638 m / s) and extremely high pressure stability (0-3000 GPa structure is complete, 1190 GPa metalization transition). The material can be widely applied in the fields of X-ray optical devices, ferroelectric memories, deep ultraviolet photoelectric detectors, extreme high-pressure sensors, directional stress sensors, mechanical logic devices, surface acoustic wave filters, multifunctional integrated microsystems and multi-parameter composite sensing networks, and opens up a new direction for pure water-based functional materials.

This application discloses an inorganic compound crystal, its preparation method, and its applications. The inorganic compound crystal has the chemical formula Ga2(OH)(TeO3)(Te2O5)Br, belongs to the orthorhombic crystal system, has a space group of Pca21, and unit cell parameters α=β=γ=90°, Z=4. The inorganic compound crystal is prepared using a hydrothermal method. Under 1064nm laser irradiation, the powder frequency doubling intensity of the inorganic compound crystal Ga2(OH)(TeO3)(Te2O5)Br is 9.8 times that of KH2PO4(KDP), and phase matching can be achieved, indicating its significant potential application value as a nonlinear optical material.

The invention relates to a broad-band cyan luminescent material excited by purple light and a preparation method and application thereof, and is characterized in that the crystal structure of the broad-band cyan luminescent material is a hexagonal crystal system, the space group is P63mc, and the broad-band cyan luminescent material belongs to a hexagonal perovskite structure type compound; the structural formula of the cyan luminescent material is Ba5La2-xScMgAl3O15: xCe < 3 + >, wherein x is more than or equal to 0.005 and less than or equal to 0.20. Compared with the prior art, the Ce < 3 + >-doped broadband cyan luminescent material is successfully prepared by taking a hexagonal perovskite structure Ba5La2ScMgAl3O15 with strong crystal stability, high thermal stability, high structural symmetry and high doping tolerance as a matrix and doping different amounts of active ions Ce < 3 + > to replace the lattice position of La.

The invention discloses a porous crystal material for air purification and a preparation method and application thereof. The crystal material belongs to a tetragonal system, the space group is P43212, the simple formula of the chemical structure is [Ni (Htbc) (fdpy) (H2O)], the molecular formula is C54H42NiN2O7, and the cell parameter is # imgabs0 # alpha = beta = gamma = 90 degrees; the prepared crystal material has a clear space structure and an accurate molecular formula, has good adsorption performance on harmful gas micromolecules, is used as a porous crystal material for removing harmful gas pollutants such as formaldehyde, acetylene, ethylene, halogenated hydrocarbon, nitric oxide, nitrogen dioxide, ammonia or sulfide and the like for air purification, and has a wide application prospect. The technology has the advantages of simplicity in operation, low cost, stable performance, suitability for large-scale production and the like.

The invention relates to a niobium tantalum oxyfluoride acid ammonium salt second-order nonlinear optical crystalline material and preparation and application thereof, the chemical formula of the material is (NH4) 5 (NbOF4) (TaF7) 2, the crystalline material belongs to a tetragonal system, the space group is I4cm, and the cell parameters are alpha = beta = gamma = 90 degrees and Z = 2. Under 1064nm laser irradiation, the powder frequency-doubled effect of the nonlinear optical crystal (NH4) 5 (NbOF4) (TaF7) 2 can reach 3.5 times that of a KH2PO4 (KDP) crystal, under 532nm laser irradiation, the powder frequency-doubled effect of the nonlinear optical crystal (NH4) 5 (NbOF4) (TaF7) 2 is 0.35 times that of a beta-BaB2O4 (BBO) crystal, and phase matching can be realized. In addition, the ultraviolet absorption cutoff edge of the crystalline material is less than 195 nm, and the crystalline material shows moderate birefringence (0.095 at-546 nm). The crystalline material provided by the invention has important application value in the photoelectric fields of solid-state lasers, spectral analysis, precision manufacturing, optical communication and the like.

This invention discloses a barium borate crystal, its preparation method, and its applications. The barium borate crystal has the chemical formula Ba₂BeB₂O₆, a non-centrosymmetric structure, belongs to the orthorhombic crystal system, has the space group Pca₂₁, and its cell parameters are α = 90°, β = 90°, and γ = 90°. This barium borate crystal exhibits extremely low birefringence from the ultraviolet to the infrared band, and its extremely low birefringence supports its application on zero-order glass slides.

The invention relates to a polymorphic nonlinear optical crystal material of 3-amino-1, 2, 4-triazole nitrate and preparation and application of the polymorphic nonlinear optical crystal material, the chemical formula of the polymorphic material is (C2H5N4) (NO3), the molecular weight is 147.11, and the polymorphic material specifically comprises two crystal forms: (1) alpha-(C2H5N4) (NO3) belongs to a triclinic system, the space group is P1, the cell parameters are alpha = 110.44-114.63 degrees, (2) beta = 93.04-97.71 degrees, gamma = 93.49-97.64 degrees and Z = 2, and compared with the prior art, the cell volume of the polymorphic nonlinear optical crystal material is larger than that of the prior art, and the cell volume of the polymorphic nonlinear optical crystal material is larger than that of the prior art The polymorphic alpha-(C2H5N4) (NO3) and beta-(C2H5N4) (NO3) materials involved in the invention have a relatively large frequency-doubled effect at 1064nm, and phase matching can be realized by the polymorphic alpha-(C2H5N4) (NO3) materials and the polymorphic beta-(C2H5N4) (NO3) materials. In addition, the ultraviolet absorption cut-off edges of the crystal material are 240 nm and 248 nm respectively, and the crystal material has wide application prospects in the photoelectric technical fields of laser frequency conversion, high-speed optical signal modulation, holographic storage systems and the like.

The invention relates to the technical field of high-flux photonics materials, in particular to a Sb < 3 + >-doped Cs3LnCl6 zero-dimensional nanocrystal as well as a preparation method and application thereof. The chemical formula of the Sb < 3 + >-doped Cs3LnCl6 zero-dimensional nanocrystal is Cs3Ln1-xSbxCl6, x ranges from 0.005 to 0.1, Ln is selected from at least one of Y, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and the Sb < 3 + >-doped Cs3LnCl6 zero-dimensional nanocrystal has the chemical formula of Cs3Ln1-xSbxCl6. The material has a zero-dimensional structure of a C2 / c space group, and is composed of an isolated [BCl6] 3-octahedron and a gap Cs < + >, the zero-dimensional nanocrystal has a deep trap state of 0.6 eV to 1.2 eV. Through zero-dimensional [BCl6] 3-octahedron lattice rigidity and deep trap carrier recovery, high-temperature anti-thermal quenching can be realized without external coating, and the problem of external passivation-performance side effects of the existing material is solved.

The invention belongs to the field of nonlinear optical crystal materials, and particularly relates to a nonlinear optical crystal and a preparation method and application thereof. The chemical formula of the nonlinear optical crystal is Zn4EuO (BO3) 3, the nonlinear optical crystal belongs to a monoclinic system, the space group is Cm, and the cell parameters are that alpha is equal to 90 degrees, beta is equal to 100.193 degrees, and gamma is equal to 90 degrees. The crystal disclosed by the invention has good SHG performance and fluorescence performance at the same time; a frequency doubling signal of the crystal is about 4 times that of a KDP sample; the fluorescent material emits red light, the service life of the Eu (5D0) state of the fluorescent material is about 1.43 milliseconds under the conditions that lambda ex and um are equal to 464 and 610 nm, and the fluorescent material is a potential luminescent material emitting red light. In addition, the optical band gap of the crystal is 3.46 eV, and the crystal has extremely high thermal stability which can reach 1100 DEG C.

The invention discloses an organic and inorganic compound crystal (H11C4N2) CdI3 as well as a preparation method and application thereof. The organic and inorganic compound crystal is a hybrid crystal, the chemical formula is (H11C4N2) CdI3, the organic and inorganic compound crystal belongs to a monoclinic system, the space group is Cc, and the cell parameters are as follows: a = 14.36-14.38, b = 7.13-7.15, c = 13.77-13.79, alpha = gamma = 90 degrees, beta = 121.2-121.4 degrees, and Z = 4. The crystal is prepared by a hydrothermal method. The organic-inorganic hybrid crystal has excellent second-order nonlinear optical performance, can output very strong 532 nm laser under 1064 nm laser irradiation, has a powder SHG coefficient 6 times that of KH2PO4 (KDP), can realize phase matching, and is a second-order nonlinear optical material with potential application value.

This invention relates to a germanium-based chiral perovskite second-order nonlinear optical crystalline material, its preparation and application, wherein the chemical formula of the material is ( R -C7H 10 NO)GeI3 and ( S -C7H 10 NO)GeI3, where R -C7H 10 NO is a (R)-2-(1-hydroxyethyl)pyridine cation. S -C7H 10 NO is a (S)-2-(1-hydroxyethyl)pyridine cation. This crystal belongs to the hexagonal crystal system, space group [space group number missing]. P 63, cell parameters a =17.0~18.0 Å, b =17.0~18.0 Å, c =7.0~8.0 Å, unit cell volume V =2000~2200 Å 3 , α = β =90°, gamma =120° Z= 2. Under 1200 nm laser irradiation, the nonlinear optical crystal of the present invention ( R -C7H 10 NO)GeI3 and ( S -C7H 10 The frequency doubling effect of GeI3 powder is 15 times that of KH2PO4; under 2000 nm laser irradiation, the frequency doubling effect of the crystalline material powder is 1.0 times that of KTiOPO4, and both can achieve phase matching. The crystalline material also has a large birefringence, wherein ( R -C7H 10 NO)GeI3 is 0.518 @ 546 nm, ( S -C7H 10 The NO)GeI3 has a wavelength of 0.529 nm at 546 nm and a moderate optical band gap (2.68 eV). The crystalline material of this invention shows significant engineering application value in nonlinear optical applications such as near-infrared laser frequency conversion, optical parametric amplification, and electro-optic signal processing.

The invention relates to a broad-band cyan luminescent material excited by purple light as well as a preparation method and application of the broad-band cyan luminescent material. The crystal structure of the broadband cyan luminescent material is a cubic system, the space group is Ia-3d, and the broadband cyan luminescent material belongs to a garnet structure type compound; the structural formula is CaLu1-xHfGa2Al3O12: xCe < 3 + >, wherein x is more than or equal to 0.005 and less than or equal to 0.20. The preparation method comprises the following steps: weighing a Ca-containing compound, a Lu-containing compound, an Hf-containing compound, a Ga-containing compound, an Al-containing compound and a Ce-containing compound according to a stoichiometric ratio of a chemical expression, grinding and uniformly mixing to obtain a mixture; pre-sintering the mixture in air to obtain an intermediate product; and grinding and dispersing the intermediate product again, and carrying out secondary sintering in a reducing atmosphere to finally obtain the broadband cyan luminescent material. Compared with the prior art, the broadband cyan luminescent material disclosed by the invention can emit cyan light covering a 420-600nm light region under excitation of purple light.

An oxide which has a garnet-type crystal structure including Li, La, and Zr, in which the crystal structure belongs to a space group I41 / acd, a percent Li occupancy of 8a sites is 30% or more and 95% or less, and a percent Li occupancy of 16e sites is 60% or less (excluding 0%).

The application discloses a kind of piperidine-based zinc-based organic-inorganic hybrid crystal and its preparation method and application, crystal is (4-chloro-1-methylpiperidinium-1-ol) 2ZnBr4, crystallize in chiral space group P21 in monoclinic system, present typical zero-dimensional packing structure, crystal is obtained by the way of room temperature volatilization crystallization, exhibit certain intensity mid-infrared second-order nonlinear optical effect, its frequency doubling coefficient is 0.29 times of commercial potassium dihydrogen phosphate (KDP) crystal, with simple preparation method and good phase purity, in laser frequency converter, electro-optic modulator, electro-optic deflector and related fields have potential application value.

The invention discloses a metal halide nonlinear optical crystal and a preparation method thereof, and relates to a nonlinear optical crystal and synthesis preparation thereof. The invention aims to solve the technical problem that the existing method is difficult to synthesize the metal halide of the mixed anions. The chemical formula of the metal halide nonlinear optical crystal is Rb2CdCl2I2, the structure of the nonlinear optical crystal does not have a symmetric center, the nonlinear optical crystal belongs to an orthorhombic system, the space group is I4mm, and the cell parameters are that a is equal to 5.31210 (10), b is equal to 5.31210 (10), c is equal to 17.7062 (10) and Z is equal to 2. The crystal is prepared by using a solution volatilization spontaneous crystallization method at 33-37 DEG C, has the advantages of low growth temperature, high crystal purity, good crystal quality, broad band gap of 3.70 eV, high laser damage threshold of 19 * AgGaS2, and ultra-wide light transmission range of 0.35-103.2 [mu] m, and can be used in the field of infrared laser.

The application belongs to the technical field of functional crystal materials, and more particularly relates to a high-stability two-dimensional Dion-Jacobson type non-lead polar hybrid perovskite crystal and a preparation method and application thereof. The high-stability two-dimensional Dion-Jacobson type non-lead polar hybrid perovskite crystal has a chemical formula of (4AMPY)2AgBiBr8, belongs to a monoclinic system, and has a space group of P21. The crystal is prepared into an X-ray detector, which can realize efficient and stable X-ray detection under zero bias voltage and high bias voltage. The single crystal is irradiated by different X-ray irradiation doses, and the X-ray response performance thereof is tested. When the crystal is irradiated by different X-ray irradiation doses, the crystal exhibits obvious light response, and the result shows that the material has potential application value as an X-ray detection material.

A sulfide solid electrolyte is provided, characterized in that it has an LGPS-type crystal structure belonging to space group P42 / nmc, and in X-ray diffraction measurements using CuKα rays, the half-width of the peak at 2θ = 29.58° ± 1.0° is less than 0.1.

The application provides a fluorinated guanidinium borate nonlinear optical crystal and a preparation method and application thereof. The chemical formula of the crystal is [C(NH2)3]B6O9F, the molecular weight is 287.95, the crystal belongs to an orthorhombic system, the space group is Pnma, Pna 21, the cell parameter is a=7.8420(11) Å, b=15.1862(19) Å, c=8.5762(9) Å, α =90°, β =90°, γ =90°, the unit cell volume is 1021.3(2) ų, the crystal is grown by a high-temperature solution method or a flux method, the frequency doubling effect of the crystal is 0.4 times of that of KH2PO4 (KDP), the ultraviolet cutoff edge is 190 nm, the birefringence is large, the birefringence is 0.133 @ 1064 nm, and the deep ultraviolet phase matching capability is deep, the shortest matching wavelength is 196 nm, and the crystal can be applied to deep ultraviolet nonlinear optical crystals in a full solid-state laser.